| Description | All of the references in one set for qualification of UV/VIS spectrophotometer for USP |
|---|---|
| Primary Usage | Validate the performance of UV spectrophotometers for USP qualification |
| Useable Range | See lising of references in each set below |
| Physical Configuration | Far UV quartz cells that have been permanently sealed by heat fusion and glass filters in aluminum holders |
| NIST Traceability | Each set is supplied with a Certificate of Analysis and NIST Traceability |
| ISO Accredited | Accredited by UKAS ISO 17025, ISO Guide34 and ISO 9001 |
Product Description
The United States Pharmacopeia Chapter <857> (May 2015) gives new recommendations for the qualification of ultraviolet and visible spectrophotometers, including tests for:
Absorbance accuracy and linearity
Wavelength accuracy
Stray light (new test procedure)
Resolution (new qualification requirement)
The new procedures became mandatory from 1st May 2016. These Starna Qualification Sets contain a number of Certified Reference Materials required to perform these tests.
UV Qualification Set
Part Number: RM-USP
This set contains Starna Certified Reference Materials to qualify a UV spectrophotometer to USP Chapter <857>
| Potassium Dichromate 60 mg/l & blank cell | Photometric Accuracy, 235 - 350 nm |
| Holmium Oxide Solution cell | Wavelength Accuracy, 240 - 640 nm |
| Potassium Chloride 10 & 5 mm cells | Stray Light, 190 - 205 nm |
| Sodium Iodide 10 & 5 mm cells | Stray Light, 210 - 259 nm |
| Acetone 10 & 5 mm cells | Stray Light, 250 - 320 nm |
| Sodium Nitrite 10 & 5 mm cells | Stray Light, 300 - 385 nm |
| Toluene in Hexane & blank cell | Resolution, 267 - 269 nm |
UV Qualification Set with Linearity
Part Number: RM-USP/3LIN
This set is the same as RM-USP, but contains two additional potassium dichromate references for checking photometric linearity.
| Potassium Dichromate 60 mg/l & blank cell | Photometric Accuracy, 235 - 350 nm |
| Potassium Dichromate 20 mg/l | Photometric Accuracy, 235 - 350 nm |
| Potassium Dichromate 100 mg/l | Photometric Accuracy, 235 - 350 nm |
| Holmium Oxide Solution cell | Wavelength Accuracy, 240 - 640 nm |
| Potassium Chloride 10 & 5 mm cells | Stray Light, 190 - 205 nm |
| Sodium Iodide 10 & 5 mm cells | Stray Light, 210 - 259 nm |
| Acetone 10 & 5 mm cells | Stray Light, 250 - 320 nm |
| Sodium Nitrite 10 & 5 mm cells | Stray Light, 300 - 385 nm |
| Toluene in Hexane & blank cell | Resolution, 267 - 269 nm |
UV Absorbance Scale & Linearity validation::
For method validation, USP <857> recommends that absorbance linearity is checked with five or more analyte concentrations. The following Potassium Dichromate sets allow instrument linearity to be checked over the relevant absorbance range.
| Photometric Linearity Set, 0.095A -1.5A | Part Number RM-0204060810 |
| Potassium Dichromate 20, 40, 60, 80, 100 mg/l & blank cell | |
| Photometric Linearity Set, 1.5A- 3.3A | Part Number RM-121416182224 |
| Potassium Dichromate 120, 140, 160, 180, 220 & 240 mg/l & blank cell | |
| Photometric Linearity Set, 0.19A - 3.3A | Part Number RM-040812162024 |
| Potassium Dichromate 40, 80, 120, 160, 200 & 240 mg/l & blank cell | |
USP Visible Transmittance/Absorbance and Wavelength Set
Part Number: RM-1N3N5DHG
These references are recommended in USP Chapter <857> for the qualification of spectrophotometers in the Visible region:
| Absorbance Accuracy, 440-635 nm | Neutral Density Filters (1.00, 0.50 & 0.25 A) |
| Wavelength Accuracy, 240 - 640 nm | Holmium Glass Filter |
NIST SRM Equivalent Sets:
These SRMs are specifically cited in USP <857> as evidence of NIST traceability.
| SRM 930e Set | Part Number: RM-1N2N3N |
| Absorbance Accuracy, 440-635 nm Neutral Density Filters: 10, 20 & 30 %T | |
| SRM 1930 Set | RM-N1N35N |
| Absorbance Accuracy, 440-635 nm Neutral Density Filters: 1, 3 & 50 %T | |
| SRM 2930 Set | RM-D1D39N |
| Absorbance Accuracy, 440-635 nm Neutral Density Filters 0.1, 0.3 & 92 %T | |
| Combined SRM Set | RM-SRM9ND |
| Absorbance Accuracy, 440-635 nm All 9 Neutral Density Filters listed above | |